| Level of physical activity | p-value | |||
| Low# | Moderate¶ | High+ | ||
| Subjects n | 41 | 207 | 143 | |
| SGRQ | ||||
| Activity | 64.1±18.9¶,+ | 52.2±20.7#,+ | 43.5±20.5#,¶ | <0.0001 |
| Impact | 40.3±21.1¶,+ | 31.2±19.0#,+ | 25.9±17.6#,¶ | <0.0001 |
| Symptoms | 45.5±25.7+ | 42.4±20.0+ | 35.8±20.4#,¶ | 0.004 |
| Total SGRQ | 48.4±19.3¶,+ | 39.4±17.7#,+ | 32.9±16.8#,¶ | <0.0001 |
| CRQ | ||||
| Mastery | 18.8±6.8+ | 20.2±5.6+ | 21.9±5.6 #,¶ | 0.002 |
| Dyspnoea | 22.1±9.0+ | 25.2±8.2 | 26.4±7.9# | 0.01 |
| Fatigue | 15.9±5.8¶,+ | 18.7±5.5# | 19.5±5.4# | 0.001 |
| Emotional function | 33.6±10.8 | 35.5±9.9 | 36.9±8.7 | 0.1 |
| Total CRQ | 90.3±27.8+ | 99.5±25.0 | 104.8±23.3# | 0.003 |
| Medical outcomes study SF-36 | ||||
| Physical component summary score | 40.6±8.1¶,+ | 45.7±7.4# | 47.3±7.8# | <0.0001 |
| Mental component summary score | 46.5±15.1+ | 49.6±11.0 | 51.4±9.3# | 0.03 |
| Physical functioning | 44.7±23.4¶,+ | 64.0±20.2#,+ | 72.7±18.9#,¶ | <0.0001 |
| Role physical | 62.2±41.9¶,+ | 80.5±33.8# | 81.8±33.1# | 0.004 |
| Bodily pain | 62.1±31.7 | 71.8±27.4 | 73.4±25.4 | 0.06 |
| General health | 42.0±24.9+ | 47.0±21.4 | 51.6±22.0# | 0.02 |
| Vitality | 51.6±24.9¶,+ | 62.0±22.4# | 67.8±23.7# | 0.0003 |
| Social functioning | 76.8±26.4+ | 83.4±21.4 | 87.3±20.3# | 0.01 |
| Role emotional | 65.0±44.7¶,+ | 83.1±34.9# | 87.6±30.0# | 0.001 |
| Mental health | 70.7±26.6+ | 75.9±21.9 | 80.1±18.7# | 0.02 |
Data are presented as mean±sd, unless otherwise stated. SGRQ: St George’s Respiratory Questionnaire; CRQ: Chronic Respiratory Questionnaire; SF-36: short form-36. #: low physical activity; ¶: moderate physical activity; +: high physical activity. #, ¶ and + indicate differences among the three physical activity categories using Scheffé test for multiple comparisons for continuous variables at p<0.05.